<template>
  <!-- 头部部分 -->
  <header class="header">
    <h1>todos</h1>
    <input v-model="name" @keyup.enter="add" @keyup.esc="name=''" class="new-todo" placeholder="请输入任务名称" autofocus />
  </header>
</template>

<script>
export default {
  data () {
    return {
      name:''
    }
  },
  methods: {
add(){
  if(this.name==='')return alert('输入框不能为空')
 this.$emit('add-event',this.name)
 this.name=''
}
  }
}
</script>

<style></style>
